Strength means power or calibre. Strength is needed to perform tasks efficiently and with great energy. Strength can be mental strength which corresponds to one’s mental calibre, intellect or intelligence. Mental strength is what comes to test in the face of adversities. Someone who possesses the strength of mind can always bear and tolerate testing situations with great composure and calmness. Physical strength refers to physical prowess and strength of body. Physical strength is what we often gain from exercise and physical fitness. Physical strength is important to function actively and with agility. In the words of Albert Einstein, “Only one who devotes himself to a cause with his whole strength and soul can be a true master. For this reason mastery demands all of a person.”